Nonlinear quantum Langevin equations for bosonic modes in solid-state systems
Abstract
Based on the experimental evidence that impurities contribute to the dissipation properties of solid-state open quantum systems, we provide here a description in terms of nonlinear quantum Langevin equations of the role played by two-level systems in the dynamics of a bosonic degree of freedom. Our starting point is represented by the description of the system/environment coupling in terms of coupling to two separate reservoirs, modelling the interaction with external bosonic modes and two level systems, respectively. Furthermore, we show how this model represents a specific example of a class of open quantum systems that can be described by nonlinear quantum Langevin equations. Our analysis offers a potential explanation of the parametric effects recently observed in circuit-QED cavity optomechanics experiments.
Cite
@article{arxiv.1711.00424,
title = {Nonlinear quantum Langevin equations for bosonic modes in solid-state systems},
author = {Juuso Manninen and Souvik Agasti and Francesco Massel},
journal= {arXiv preprint arXiv:1711.00424},
year = {2017}
}
Comments
10 pages, 5 figures